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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 275 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.15% of 890 =
  2. 2.5% of 610 =
  3. 3.10% of 230 =
  4. 4.15% of 730 =
  5. 5.10% of 760 =
  6. 6.5% of 30 =
  7. 7.15% of 330 =
  8. 8.15% of 480 =
  9. 9.10% of 20 =
  10. 10.20% of 410 =
  11. 11.50% of 880 =
  12. 12.15% of 170 =
  13. 13.10% of 900 =
  14. 14.15% of 280 =
  15. 15.1% of 310 =
  16. 16.20% of 420 =
  17. 17.10% of 180 =
  18. 18.15% of 690 =
  19. 19.25% of 820 =
  20. 20.1% of 320 =
  21. 21.20% of 30 =
  22. 22.10% of 310 =
  23. 23.1% of 700 =
  24. 24.10% of 420 =
  25. 25.15% of 270 =
  26. 26.20% of 350 =
  27. 27.20% of 340 =
  28. 28.20% of 880 =
  29. 29.25% of 480 =
  30. 30.50% of 330 =
  31. 31.10% of 760 =
  32. 32.15% of 410 =
  33. 33.15% of 840 =
  34. 34.5% of 690 =
  35. 35.15% of 800 =
  36. 36.1% of 30 =
  37. 37.5% of 500 =
  38. 38.5% of 540 =
  39. 39.15% of 470 =
  40. 40.20% of 800 =

Answer key

  1. 133.5
  2. 30.5
  3. 23
  4. 109.5
  5. 76
  6. 1.5
  7. 49.5
  8. 72
  9. 2
  10. 82
  11. 440
  12. 25.5
  13. 90
  14. 42
  15. 3.1
  16. 84
  17. 18
  18. 103.5
  19. 205
  20. 3.2
  21. 6
  22. 31
  23. 7
  24. 42
  25. 40.5
  26. 70
  27. 68
  28. 176
  29. 120
  30. 165
  31. 76
  32. 61.5
  33. 126
  34. 34.5
  35. 120
  36. 0.3
  37. 25
  38. 27
  39. 70.5
  40. 160

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